Hello everyone, I recently built my first drone and im having problems with the flight controller.firstly , i want to flash cleanflight firmware into my cc3d using librepilot.. but, after i flash the firmware and go to cleanflight , the cleanflight cannot connect to my CC3D and my computer cannot recognize my cc3d.. after that, i open librepilot and the same thing happen... after i flash the cleanflight firmware, the blue led on the cc3d no pulse... when i connect the use to the board... the green light and the blue light turn on.. but, after a few second , the blue light has turn off.. i have buy a FTDI cable and i dont know what i suppose to do.. please help me